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Friday, July 25, 2014

The Double Tree of Casorzo

Between Grana and Casorzo in Piemonte, Italy, a very unique tree grows. Known as the “double tree of Casorzo” or Bialbero de Casorzo in Italian, it is a mulberry tree on top of which a cherry tree grows. The cherry tree rises well above the mulberry tree on which it stands. The strange tree is also known as Grana Double Tree.
Nobody knows for sure how this happened; probably some bird dropped a seed on top of the mulberry which then grew roots through the hollow trunk of the host tree to reach the soil. While trees growing parasitically over another tree is not unusual, but they normally do not reach the size and lifespan as seen in this particular example, as there is not enough humus and space available where they grow. Large “double-trees”, also called Epiphytes, like the Bialbero de Casorzo are a rarity.
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